DE3822888A1 - METHOD FOR THE CONTINUOUS PRODUCTION OF AN EXTRUDED PROFILE WITH CROSS-SECTION DIMENSIONS CHANGEABLE ABOUT THE LENGTH OF THE PROFILE - Google Patents

METHOD FOR THE CONTINUOUS PRODUCTION OF AN EXTRUDED PROFILE WITH CROSS-SECTION DIMENSIONS CHANGEABLE ABOUT THE LENGTH OF THE PROFILE

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Publication number
DE3822888A1
DE3822888A1 DE3822888A DE3822888A DE3822888A1 DE 3822888 A1 DE3822888 A1 DE 3822888A1 DE 3822888 A DE3822888 A DE 3822888A DE 3822888 A DE3822888 A DE 3822888A DE 3822888 A1 DE3822888 A1 DE 3822888A1
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Germany
Prior art keywords
profile
cross
extrusion head
deviations
length
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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DE3822888A
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German (de)
Inventor
Franco Gastaldi
Gian Paolo Ferrero
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ContiTech Ages SpA
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Ages SpA
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Publication of DE3822888A1 publication Critical patent/DE3822888A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J10/00—Sealing arrangements
    • B60J10/20—Sealing arrangements characterised by the shape
    • B60J10/22—Sealing arrangements characterised by the shape having varying cross-section in the longitudinal direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/302—Extrusion nozzles or dies being adjustable, i.e. having adjustable exit sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92076—Position, e.g. linear or angular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92142—Length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/92409—Die; Nozzle zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92571—Position, e.g. linear or angular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/26—Sealing devices, e.g. packaging for pistons or pipe joints

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
  • Seal Device For Vehicle (AREA)

Abstract

In the method for the continuous production of an extruded profile having cross-sectional dimensions which vary with its length, effected with the use of an extrusion head provided with at least one movable member which is adapted to modify the section of the extrusion orifice, data and/or information representing the law of variation of the position of the movable member in dependence on the length of the extruded profile according to a predetermined model of the profile to be produced are stored on a recording medium, an operating and control unit being provided for reading information and/or data from the recording medium and for causing the controlled displacement of the movable member of the extrusion head according to the law read from the medium, the deviations from the desired value of at least one parameter of the shape of the section of the profile produced by the extrusion head being monitored and adjustment means associated with the control and operating unit being operated in dependence on the deviations detected to alter from outside the law of variation of the position of the movable member so as to minimise the deviations.

Description

Die Erfindung bezieht sich auf ein Verfahren für die kontinuierliche Herstellung eines extrudierten Profils mit über seine Länge veränderlichem Querschnitt, ins­ besondere eines Dichtungsprofils für die Karosserie eines Kraftfahrzeugs, unter Verwendung einer Strangpresse mit einem Strangpreßkopf, welcher wenigstens ein bewegliches Teil aufweist, mittels dessen sich der Querschnitt des Extrudermundstücks in Abhängigkeit von der jeweiligen Stellung verändern läßt.The invention relates to a method for the continuous production of an extruded profile with cross-section variable over its length, ins special of a sealing profile for the body of a Motor vehicle, using an extruder with an extrusion head which has at least one movable Has part by means of which the cross section of the Extruder mouthpiece depending on the particular Can change position.

Bei bekannten Verfahren der vorstehend bezeichneten Art ist es besonders schwierig, Strangpreßprofile von gleich­ bleibender Qualität mit vorbestimmten Abmessungen des Querschnitts zu erhalten. Die tatsächlichen Abmessungen des extrudierten und anschließend vulkanisierten Profils sind von zahlreichen Variablen abhängig, z.B. der genauen Zusammensetzung des verwendeten Materials und den bei der Vulkanisation herrschenden Bedingungen, welche sich oft nicht zuverlässig vorherbestimmen lassen.In known methods of the type described above it is particularly difficult to make extruded profiles of the same lasting quality with predetermined dimensions of the Get cross section. The actual dimensions of the extruded and then vulcanized profile dependent on numerous variables, e.g. the exact Composition of the material used and that at Vulcanization prevailing conditions, which are often cannot be reliably predetermined.

Ein wichtiges Ziel der Erfindung ist die Schaffung eines besonders einfachen Verfahrens, welches es ermöglicht, ein den gestellten Anforderungen möglichst genau entsprechen­ des Strangpreßprofil zu erzeugen und damit den Anfall von Ausschuß möglichst einzuschränken.An important aim of the invention is to create one particularly simple process, which enables a meet the requirements as closely as possible to produce the extruded profile and thus the accumulation of Limit committee as much as possible.

Bei einem Verfahren der eingangs genannten Art ist dieses Ziel durch eine Kombination der folgenden Schritte erreicht: Speicherung von dem Gesetz der Stellungsänderung des wenigstens einen beweglichen Teils des Strangpreßkopfs in Abhängigkeit von der jeweiligen Länge des extrudierten Profils entsprechend einem vorbestimmten Modell des herzustellenden Profils entsprechenden Daten und/oder Informationen auf einem maschinenlesbaren Aufzeichnungs­ träger,
Verwendung einer Steuer- und Betätigungseinheit zum Lesen der Daten und/oder Informationen vom Aufzeichnungsträger und Steuern der Bewegungen des wenigstens einen beweglichen Teil des Strangpreßkopfs entsprechend dem vom Aufzeichnungs­ träger abgelesenen Gesetz, wobei die Einheit von Hand bedienbare Verstell- und Betätigungseinrichtungen aufweist, welche es ermöglichen, das vom Aufzeichnungsträger abgele­ sene Gesetz von außen abzuwandeln,
Überwachung der Abweichungen von dem vorgegebenen Wert wenigstens eines Parameters der Querschnittsform des mittels des Strangpreßkopfs hergestellten Profils, und Betätigung der Verstelleinrichtung in Abhängigkeit von festgestellten Abweichungen im Sinne einer Korrektur der Abweichungen (während der Herstellungsphase).In the case of a method of the type mentioned at the outset, this goal is achieved by a combination of the following steps: storing the law of changing the position of the at least one movable part of the extrusion head as a function of the respective length of the extruded profile in accordance with a predetermined model of the profile to be produced and / or information on a machine-readable recording medium,
Use of a control and actuation unit for reading the data and / or information from the record carrier and controlling the movements of the at least one movable part of the extrusion head in accordance with the law read from the record carrier, the unit having manually operated adjustment and actuation devices which make it possible to amend the law read from the record carrier from the outside,
Monitoring of the deviations from the predetermined value of at least one parameter of the cross-sectional shape of the profile produced by means of the extrusion head, and actuation of the adjusting device as a function of detected deviations in the sense of a correction of the deviations (during the manufacturing phase).

Im folgenden ist ein Ausführungsbeispiel der Erfinfung anhand der Zeichnung erläutert. Es zeigen:The following is an embodiment of the invention explained using the drawing. Show it:

Fig. 1 ein Blockschaltbild einer Vorrichtung für die Durchführung des Verfahrens, Fig. 1 is a block diagram of an apparatus for carrying out the method,

Fig. 2 eine Seitenansicht eines nach dem Verfahren her­ stellbaren Dichtungsprofils für ein Kraftfahrzeug, Fig. 2 is a side view of an adjustable according to the procedure forth sealing profile for a motor vehicle,

Fig. 3, 4 und 5 Ansichten im Schnitt entlang den Linien III-III, IV-IV bzw. V-V in Fig. 2, Fig. 3, 4 and 5 are views in section taken along lines III-III, IV-IV and VV in Fig. 2,

Fig. 6 eine Stirnansicht eines zu der in Fig. 1 darge­ stellten Vorrichtung gehörigen Strangpreßmundstücke und Fig. 6 is an end view of one of the apparatus shown in Fig. 1 Darge associated extrusion dies and

Fig. 7 eine grafische Darstellung des Gesetzes der Änderung zweier Abmessungen eines Dichtungsprofils. Fig. 7 is a graphical representation of the law of changing two dimensions of a sealing profile.

Eine in Fig. 1 insgesamt mit 2 bezeichnete Strangpreß­ vorrichtung hat zwei Strangpreßzylinder 4 und 6 für die Zufuhr jeweils eines Materialstroms zu einem Strankpreß­ kopf 8. Der ersten Strangpreßzylinder liefert beispiels­ weise ein homogenes elastomeres Material, während der zweite Strangpreßzylinder ein mit einem Aufschäummittel versetztes elastomeres Material liefern kann. Ein am Strangpreßkopf 8 angesetztes Strangpreßmundstück 10 hat ein oder mehrere bewegliche Teile oder Sperrschieber 12, 14 (Fig. 6), mittels welcher sich die Form der Austritts­ öffnung 16 des Mundstücks verändern läßt. Jeder Sperr­ schieber ist zwischen zwei Führungen 18 und 20 gehalten und in den in Fig. 6 durch Pfeile F 1 bzw. F 2 angedeuteten Richtungen verstellbar.An overall designated in Fig. 1 with 2 extrusion device has two extrusion cylinders 4 and 6 for the supply of a material flow to an extrusion head 8th The first extrusion cylinder provides, for example, a homogeneous elastomeric material, while the second extrusion cylinder can deliver an elastomeric material mixed with a foaming agent. An extrusion head 10 attached to the extrusion head 8 has one or more movable parts or locking slides 12 , 14 ( FIG. 6), by means of which the shape of the outlet opening 16 of the mouthpiece can be changed. Each locking slide is held between two guides 18 and 20 and adjustable in the directions indicated by arrows F 1 and F 2 in FIG. 6.

Ein aus dem Strangpreßmundstück austretendes Strangpreß­ profil T durchläuft nacheinander eine oder mehrere Vulkanisierstationen mit einem Mikrowellenofen und einem oder mehreren Heißluftöfen und anschließend eine Abschneid­ station 24, von welcher es zu einer Sammelstation 26 gelangt.An extruding profile T emerging from the extrusion die passes through one or more vulcanizing stations with a microwave oven and one or more hot air ovens and then a cutting station 24 , from which it arrives at a collecting station 26 .

Ein Längenmeßgeber, beispielsweise ein Drehmeßgeber 28 dient der Erzeugung eines die fortlaufende Länge des Strangpreßprofils T angebenden elektrischen Signals. Das vom Längenmeßgeber erzeugte Signal wird an den Eingang einer Steuer- und Betätigungseinheit 30 gelegt, welche einen Verstellmotor 32 steuert. Dieser bewirkt seiner­ seits die gesteuerte Verstellung der Sperrschieber 12 und 14.A length encoder, for example a rotary encoder 28, is used to generate an electrical signal indicating the continuous length of the extruded profile T. The signal generated by the length encoder is applied to the input of a control and actuation unit 30 which controls an adjusting motor 32 . This in turn effects the controlled adjustment of the locking slides 12 and 14 .

In Fig. 2 bis 5 ist ein Beispiel für ein unter Anwendung des erfindungsgemäßen Verfahrens herstellbares Dichtungs­ profil dargestellt. Das Dichtungsprofil setzt sich zu­ sammen aus einem aus homogenem elastomerem Material geformten Befestigungsprofil 40 von U-förmigem Querschnitt und einem Wulst 42 aus ein Zellengefüge aufweisendem Material. Die Querschnittsabmessungen des Dichtungsprofils sind in aufeinander folgenden Abschnitten veränderlich. Bei der in Fig. 4 gezeigten Grundform des Profils hat der freie Schenkel die Höhe x o und der Wulst eine Wand­ stärke z o, während sich die in Fig. 3 und 5 gezeigten Profilformen durch die Höhe x 1 des freien Schenkels bzw. die Wandstärke z 1 des Wulsts davon unterscheiden. Den Abmessungen x o und x1 des freien Schenkels entsprechen Stellungen y o bzw. y1 des Sperrschiebers 12 in einem auf die Achse, entlang welcher der Sperrschieber bewegbar ist, bezogenen Bezugssystem. Desgleichen entsprechen Stellungen w o und w1 des Sperrscheibers 14 den Wandstärken z o bzw. z1 des Wulsts in bezug auf eine feststehende Bezugsgröße.In FIG. 2 through 5, an example of a producible using the method according to the invention is shown sealing profile. The sealing profile is composed of a fastening profile 40 of U-shaped cross-section formed from homogeneous elastomeric material and a bead 42 of a material having a cell structure. The cross-sectional dimensions of the sealing profile can be changed in successive sections. In the basic shape of the profile shown in FIG. 4, the free leg has the height x o and the bead has a wall thickness z o , while the profile shapes shown in FIGS. 3 and 5 are characterized by the height x 1 of the free leg or the wall thickness Differentiate z 1 of the bead from it. The dimensions x o and x 1 of the free leg correspond to positions y o and y 1 of the locking slide 12 in a reference system related to the axis along which the locking slide can be moved. Likewise, positions w o and w 1 of the locking disk 14 correspond to the wall thicknesses z o and z 1 of the bead with respect to a fixed reference quantity.

Zur Durchführung des erfindungsgemäßen Verfahrens werden dem Gesetz, nach welchem die Stellungen der Sperrschieber zu verändern sind, entsprechende Daten und/oder Informa­ tionen auf einem maschinenlesbaren Aufzeichnungsträger gespeichert, z. B. auf einem Lochstreifen. Die Aufzeich­ nung dieser Daten erfolgt beispielsweise unter Verwendung eines Programmiergeräts mit einem zusätzlichen Druckwerk zum Erzeugen einer grafischen Darstellung des Änderungs­ gesetzes für jeden Parameter, wie z.B. in Fig. 7 darge­ stellt. Die bei diesem Programmiervorgang gespeicherten Daten und Informationen entsprechend einem vorbestimmten Modell des herzustellenden Strangpreßprofils.To carry out the method according to the invention, the law according to which the positions of the locking slide are to be changed, corresponding data and / or information is stored on a machine-readable recording medium, for. B. on a paper tape. This data is recorded, for example, using a programming device with an additional printing unit for generating a graphical representation of the change law for each parameter, as shown in FIG. 7, for example. The data and information stored in this programming process in accordance with a predetermined model of the extrusion profile to be produced.

Der Aufzeichnungsträger wird dann der Steuer- und Betä­ tigungseinheit eingegeben, welche zum Ablesen der gespeicherten Daten eingerichtet ist.The record carrier then becomes the tax and bet entered unit, which for reading the stored data is set up.

Der Steuer- und Betätigungseinheit 30 zugeordnet ist eine Hilfssteuereinrichtung 34, z.B. eine Tastatur mit einem dazugehörigen Sichtgerät, welche durch eine Bedienungs­ person von Hand betätigbar ist, um daß vom Aufzeichnungs­ träger abgelesene, dem vorbestimmten Modell des Profils entsprechende Gesetz durch Eingriff von außen abzuwandeln. Die Steuer- und Betätigungseinheit verarbeitet das der fortlaufenden Länge des Strangpreßprofils entsprechende Ausgangssignals des Längenmeßgebers 28 und liefert ent­ sprechende Signale an den Stellmotor 32, um die Verstel­ lung der Sperrschieber in Übereinstimmung mit dem genannten Gesetz zu bewirken.The control and actuation unit 30 is associated with an auxiliary control device 34 , for example a keyboard with an associated display device, which can be operated by an operator by hand in order to modify the law read from the record carrier, the predetermined model of the profile, by external intervention. The control and actuation unit processes the output signal of the length encoder 28 corresponding to the continuous length of the extruded profile and supplies appropriate signals to the servomotor 32 in order to effect the adjustment of the locking slide in accordance with the aforementioned law.

Während des Strangpressens werden Abweichungen von den vorgegebenen Nennparametern der Querschnittsform des hergestellten Strangpreßprofils beispielsweise an der Sammelstation 26 ermittelt und festgestellt. Dementspre­ chend kann dann die Hilfssteuereinrichtung 34 betätigt werden, um die auf dem zugeordneten Sichtgerät darge­ stellten, dem Änderungsgesetz der Profilparameter ent­ sprechenden Daten so abzuändern, daß die Abweichung der ermittelten Werte von den Nennwerten auf ein Mindestmaß verringert wird.During the extrusion, deviations from the specified nominal parameters of the cross-sectional shape of the extruded profile produced are determined and ascertained, for example, at the collecting station 26 . Accordingly, the auxiliary control device 34 can then be actuated in order to change the data presented on the associated display device to correspond to the law of change of the profile parameters so that the deviation of the determined values from the nominal values is reduced to a minimum.

Das erfindungsgemäße Verfahren ermöglicht somit äußerst kurzfristige Eingriffe von außen für die Berichtigung von Abweichungen der ermittelten Werte bestimmter Parameter von den entsprechenden Nennwerten, welche im Laufe des Verfahrens etwa aufgrund von Änderungen der Zusammen­ setzung des verwendeten elastomeren Materials auftreten oder durch andere Variable hervorgerufen werden können, welche die Abmessungen des Strangpreßprofils beeinflussen und nicht genau vorherbestimmbar sind.The method according to the invention thus enables extremely short-term external intervention for the correction of Deviations of the determined values of certain parameters of the corresponding nominal values, which in the course of the Procedure due to changes in the relationship Settlement of the elastomeric material used occur or can be caused by other variables, which affect the dimensions of the extruded profile and cannot be predicted exactly.

Die Steuer- und Betätigungseinheit kann außerdem die Betätigung einer Markiereinrichtung 36 steuern, um das hergestellte Strangpreßprofil an gewissen Stellen oder in bestimmten Längsabständen mit Markierungen zu versehen.The control and actuation unit can also control the actuation of a marking device 36 in order to provide the extruded profile with markings at certain points or at certain longitudinal distances.

Claims (1)

Verfahren für die kontinuierliche Herstellung eines extrudierten Profils mit über seine Länge veränderlichem Querschnitt unter Verwendung einer Strangpreßvorrichtung mit einem Strangpreßkopf, welcher wenigstens ein beweg­ liches Teil aufweist, mittels dessen der Querschnitt des Strangpreßmundstücks in einem von seiner jeweiligen Stel­ lung abhängigen Maß veränderbar ist, dadurch gekennzeichnet, daß es die folgenden Schritte umfaßt:
Speicherung von den Gesetzen der Stellungsänderung des wenigstens einen beweglichen Teils des Strangpreßkopfs in Abhängigkeit von der fortlaufenden Länge des extru­ dierten Profils gemäß einem vorbestimmten Modell des herzustellenden Profils entsprechenden Daten und/oder Informationen auf einem maschinenlesbaren Aufzeichnungs­ träger,
Verwendung einer Steuer- und Betätigungseinheit zum Ablesen der gespeicherten Daten und/oder Informationen von dem Aufzeichnungsträger und zum Steuern der Verstel­ lung des wenigstens einen beweglichen Teils des Strang­ preßkopfs in Übereinstimmung mit dem vom Aufzeichnungs- Hand bedienbare Hilfssteuereinheit zugeordnet ist, welche es ermöglicht, das vom Aufzeichnungsträger abgelesene Gesetz durch Eingriff von außen zu ändern,
Ermittlung der Abweichungen wenigstens eines Parameters der Querschnittsform des hergestellten Profils von einem vorgegebenen Nennwert, und
Betätigung der Hilfssteuereinrichtung in Abhängigkeit von den ermittelten Abweichungen im Sinne einer Korrektur der Abweichungen während des Herstellungsvorgangs.A process for the continuous production of an extruded profile with variable over its length, cross-section, using an extruder with an extrusion head having at least Move-pending portion, by means of which the cross section of Strangpreßmundstücks is from its respective Stel lung dependent measurement variable within a characterized in that it comprises the following steps:
Storage of the laws of the change in position of the at least one movable part of the extrusion head as a function of the continuous length of the extruded profile according to a predetermined model of the profile to be produced, corresponding data and / or information on a machine-readable recording medium,
Use of a control and actuation unit for reading the stored data and / or information from the recording medium and for controlling the adjustment of the at least one movable part of the extrusion head in accordance with the auxiliary control unit which can be operated by the recording hand and which enables the to change the law read from the record carrier by external intervention,
Determining the deviations of at least one parameter of the cross-sectional shape of the profile produced from a predetermined nominal value, and
Actuation of the auxiliary control device in dependence on the determined deviations in the sense of a correction of the deviations during the manufacturing process.
DE3822888A 1987-07-14 1988-07-06 METHOD FOR THE CONTINUOUS PRODUCTION OF AN EXTRUDED PROFILE WITH CROSS-SECTION DIMENSIONS CHANGEABLE ABOUT THE LENGTH OF THE PROFILE Ceased DE3822888A1 (en)

Applications Claiming Priority (1)

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IT8767609A IT1211208B (en) 1987-07-14 1987-07-14 PROCEDURE FOR THE CONTINUOUS PRODUCTION OF AN EXTRUDED PROFILE WITH CROSS SECTION DIMENSIONS VARIANTS ACCORDING TO THE LENGTH OF THE SAME PROFILE

Publications (1)

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DE3822888A1 true DE3822888A1 (en) 1989-01-26

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DE3822888A Ceased DE3822888A1 (en) 1987-07-14 1988-07-06 METHOD FOR THE CONTINUOUS PRODUCTION OF AN EXTRUDED PROFILE WITH CROSS-SECTION DIMENSIONS CHANGEABLE ABOUT THE LENGTH OF THE PROFILE

Country Status (6)

Country Link
JP (1) JPS6430727A (en)
BR (1) BR8800770A (en)
DE (1) DE3822888A1 (en)
FR (1) FR2618095B1 (en)
GB (1) GB2206839B (en)
IT (1) IT1211208B (en)

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DE102005018906A1 (en) * 2005-04-25 2006-10-26 Sg Technologies Gmbh Extruded sealing cord for use e.g. as a car door seal, has a tubular section with slots for drainage, ventilation and-or pressure equalisation, formed during extrusion by removing tube wall material sideways
DE102010009746A1 (en) * 2010-03-01 2011-09-01 SaarGummi technologies S.à.r.l. Method and device for producing a sealing strip by extrusion

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US5061335A (en) * 1989-09-25 1991-10-29 Hashimoto Forming Industry Co., Ltd. Method of, and apparatus for manufacturing elongate plastic articles
AU618406B2 (en) * 1989-09-26 1991-12-19 Hashimoto Forming Industry Co. Limited Method of, and apparatus for manufacturing elongate plastic articles
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JP2542741Y2 (en) * 1990-04-12 1997-07-30 三菱重工業株式会社 Hydraulic heavy load support device
JP2801446B2 (en) * 1991-09-30 1998-09-21 東海興業株式会社 Automotive wind molding and method of manufacturing the same
JP3150392B2 (en) * 1991-12-10 2001-03-26 東海興業株式会社 Automotive wind molding
GB0008553D0 (en) 2000-04-06 2000-05-24 Unilever Plc Process and apparatus for the production of a detergent bar

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DE102005018906B4 (en) * 2005-04-25 2011-01-05 SaarGummi technologies S.à.r.l. Method for producing an extruded sealing strip
DE102010009746A1 (en) * 2010-03-01 2011-09-01 SaarGummi technologies S.à.r.l. Method and device for producing a sealing strip by extrusion

Also Published As

Publication number Publication date
JPS6430727A (en) 1989-02-01
IT1211208B (en) 1989-10-12
FR2618095B1 (en) 1992-04-03
FR2618095A1 (en) 1989-01-20
IT8767609A0 (en) 1987-07-14
GB2206839A (en) 1989-01-18
BR8800770A (en) 1989-01-17
GB2206839B (en) 1990-12-19
GB8814361D0 (en) 1988-07-20

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